Added Data Structures and Algorithms in Java (#7788)

courses/free-courses-en.md

@@ -128,6 +128,7 @@
 * [Data Structures and Algorithms](https://www.youtube.com/playlist?list=PLdo5W4Nhv31bbKJzrsKfMpo_grxuLl8LU) - Jenny's lectures CS/IT NET&JRF
 * [Data Structures and Algorithms for Beginners](https://www.youtube.com/watch?v=BBpAmxU_NQo) - Mosh Hamedani (Programming with Mosh)
 * [Data Structures and Algorithms Full Course](https://www.youtube.com/watch?v=LcKqYoX8uH4) - Simplilearn (YouTube, Video length 7:13:56)
+* [Data Structures and Algorithms in Java Full Course](https://youtube.com/playlist?list=PL6Zs6LgrJj3tDXv8a_elC6eT_4R5gfX4d) - Dinesh Varyani (YouTube playlist)
 * [Data Structures and Algorithms Specialization](https://www.coursera.org/specializations/data-structures-algorithms) - UC San Diego, HSE University
 * [Data Structures Easy to Advanced Course - Full Tutorial from a Google Engineer](https://www.youtube.com/watch?v=RBSGKlAvoiM) - William Fiset (freeCodeCamp)
 * [IIT Bombay Foundation of Data Structures (CS213.1x)](https://courses.edx.org/courses/course-v1:IITBombayX+CS213.1x+1T2017/course/)